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deref / exo

A process manager & log viewer for dev
https://exo.deref.io
Apache License 2.0
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Use bridge gateway as syslog host #526

Closed BenElgar closed 3 years ago

brandonbloom commented 3 years ago

@BenElgar This doesn't work on Mac. I get 172.17.0.1 which is no good.

brandonbloom commented 3 years ago

@BenElgar Why doesn't the extra-hosts thing work on Linux? It's documented to work as of Docker 20.10; what version are you running?

BenElgar commented 3 years ago

Ah, I thought that the bridge would be tunnelled to the host. Clearly not. Could you list the network interfaces available to you? ifconfig or equivalent?

❯ docker --version
Docker version 20.10.9, build c2ea9bc90b

My understanding is that extra hosts is adding entries to the /etc/hosts file inside of the containers that are being created. And since the docker daemon isn't running in a container extra hosts has no effect.

brandonbloom commented 3 years ago

My understanding is that extra hosts is adding entries to the /etc/hosts file inside of the containers that are being created. And since the docker daemon isn't running in a container extra hosts has no effect.

Ah, ok that makes sense.

Could you list the network interfaces available to you?

Followed the instructions here: https://gist.github.com/BretFisher/5e1a0c7bcca4c735e716abf62afad389

$ docker run -it --rm --privileged --pid=host justincormack/nsenter1

Unable to find image 'justincormack/nsenter1:latest' locally
latest: Pulling from justincormack/nsenter1
5bc638ae6f98: Pull complete 
Digest: sha256:e876f694a4cb6ff9e6861197ea3680fe2e3c5ab773a1e37ca1f13171f7f5798e
Status: Downloaded newer image for justincormack/nsenter1:latest
/ # ifconfig
br-aa47c8cdda66 Link encap:Ethernet  HWaddr 02:42:6A:2F:3F:D6  
          inet addr:172.18.0.1  Bcast:172.18.255.255  Mask:255.255.0.0
          inet6 addr: fe80::42:6aff:fe2f:3fd6/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:470 (470.0 B)

br-d8222b257c19 Link encap:Ethernet  HWaddr 02:42:FD:C6:5E:56  
          inet addr:172.23.0.1  Bcast:172.23.255.255  Mask:255.255.0.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

docker0   Link encap:Ethernet  HWaddr 02:42:0C:B8:45:4E  
          inet addr:172.17.0.1  Bcast:172.17.255.255  Mask:255.255.0.0
          inet6 addr: fe80::42:cff:feb8:454e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4449 errors:0 dropped:0 overruns:0 frame:0
          TX packets:14783 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:183736 (179.4 KiB)  TX bytes:21807987 (20.7 MiB)

eth0      Link encap:Ethernet  HWaddr 02:50:00:00:00:01  
          inet addr:192.168.65.3  Bcast:192.168.65.255  Mask:255.255.255.0
          inet6 addr: fe80::50:ff:fe00:1/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:67784 errors:0 dropped:0 overruns:0 frame:0
          TX packets:18194 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:100236656 (95.5 MiB)  TX bytes:1460827 (1.3 MiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:668 errors:0 dropped:0 overruns:0 frame:0
          TX packets:668 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:117122 (114.3 KiB)  TX bytes:117122 (114.3 KiB)

services1 Link encap:Ethernet  HWaddr 22:90:58:B2:DC:0D  
          inet addr:192.168.65.4  Bcast:0.0.0.0  Mask:255.255.255.255
          inet6 addr: fe80::2090:58ff:feb2:dc0d/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:153 errors:0 dropped:0 overruns:0 frame:0
          TX packets:155 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:11705 (11.4 KiB)  TX bytes:11133 (10.8 KiB)

vethf851f06 Link encap:Ethernet  HWaddr 2A:CC:1C:DE:81:22  
          inet6 addr: fe80::28cc:1cff:fede:8122/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:736 (736.0 B)

Does that help?

BenElgar commented 3 years ago

Ah sorry — I actually meant locally, not in the docker VM.

brandonbloom commented 3 years ago

On my machine:

lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
    options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
    inet 127.0.0.1 netmask 0xff000000 
    inet6 ::1 prefixlen 128 
    inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1 
    nd6 options=201<PERFORMNUD,DAD>
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=50b<RXCSUM,TXCSUM,VLAN_HWTAGGING,AV,CHANNEL_IO>
    ether 20:e2:a8:b8:06:5e 
    inet6 fe80::189e:4a7f:3603:9c7c%en0 prefixlen 64 secured scopeid 0x4 
    inet 192.168.1.40 netmask 0xffffff00 broadcast 192.168.1.255
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect (1000baseT <full-duplex,flow-control>)
    status: active
en4: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    ether ac:de:48:00:11:22 
    inet6 fe80::aede:48ff:fe00:1122%en4 prefixlen 64 scopeid 0x5 
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect (100baseTX <full-duplex>)
    status: active
ap1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
    options=400<CHANNEL_IO>
    ether 36:7d:da:c0:82:01 
    media: autoselect
    status: inactive
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=6463<RXCSUM,TXCSUM,TSO4,TSO6,CHANNEL_IO,PARTIAL_CSUM,ZEROINVERT_CSUM>
    ether 14:7d:da:c0:82:01 
    inet6 fe80::c84:40b6:2d9:9e63%en1 prefixlen 64 secured scopeid 0x7 
    inet 192.168.2.71 netmask 0xffffff00 broadcast 192.168.2.255
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect
    status: active
awdl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
    options=400<CHANNEL_IO>
    ether da:b8:c5:c1:51:b8 
    inet6 fe80::d8b8:c5ff:fec1:51b8%awdl0 prefixlen 64 scopeid 0x8 
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect
    status: active
en3: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
    options=460<TSO4,TSO6,CHANNEL_IO>
    ether 82:88:73:43:88:01 
    media: autoselect <full-duplex>
    status: inactive
llw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=400<CHANNEL_IO>
    ether da:b8:c5:c1:51:b8 
    inet6 fe80::d8b8:c5ff:fec1:51b8%llw0 prefixlen 64 scopeid 0xa 
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect
    status: active
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
    options=460<TSO4,TSO6,CHANNEL_IO>
    ether 82:88:73:43:88:00 
    media: autoselect <full-duplex>
    status: inactive
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=63<RXCSUM,TXCSUM,TSO4,TSO6>
    ether 82:88:73:43:88:00 
    Configuration:
        id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
        maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
        root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
        ipfilter disabled flags 0x0
    member: en2 flags=3<LEARNING,DISCOVER>
            ifmaxaddr 0 port 11 priority 0 path cost 0
    member: en3 flags=3<LEARNING,DISCOVER>
            ifmaxaddr 0 port 9 priority 0 path cost 0
    nd6 options=201<PERFORMNUD,DAD>
    media: <unknown type>
    status: inactive
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
    inet6 fe80::7ba8:ea5f:9dcd:78b%utun0 prefixlen 64 scopeid 0xd 
    nd6 options=201<PERFORMNUD,DAD>
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
    inet6 fe80::5ea6:eaed:aaa3:7%utun1 prefixlen 64 scopeid 0xe 
    nd6 options=201<PERFORMNUD,DAD>
utun2: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1000
    inet6 fe80::ce81:b1c:bd2c:69e%utun2 prefixlen 64 scopeid 0xf 
    nd6 options=201<PERFORMNUD,DAD>
utun3: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
    inet6 fe80::bea8:923:6299:ba30%utun3 prefixlen 64 scopeid 0x10 
    nd6 options=201<PERFORMNUD,DAD>
utun4: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
    inet6 fe80::9fe9:fca7:3ff6:ad91%utun4 prefixlen 64 scopeid 0x11 
    nd6 options=201<PERFORMNUD,DAD>
utun5: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1280
    options=6463<RXCSUM,TXCSUM,TSO4,TSO6,CHANNEL_IO,PARTIAL_CSUM,ZEROINVERT_CSUM>
    inet6 fe80::22e2:a8ff:feb8:65e%utun5 prefixlen 64 scopeid 0x12 
    inet 100.74.118.123 --> 100.74.118.123 netmask 0xffffffff 
    inet6 fd7a:115c:a1e0:ab12:4843:cd96:624a:767b prefixlen 48 
    nd6 options=201<PERFORMNUD,DAD>
en7: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=400<CHANNEL_IO>
    ether e2:eb:40:90:6d:c7 
    inet6 fe80::f5:e3e0:9c5a:4d6c%en7 prefixlen 64 secured scopeid 0x13 
    inet 169.254.45.88 netmask 0xffff0000 broadcast 169.254.255.255
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect (100baseTX <full-duplex>)
    status: active
BenElgar commented 3 years ago

Gotch. ~What IP does host.docker.internal resolve to locally (not in the VM)?~ Nvm. Dumb question.

brandonbloom commented 3 years ago 
$ nslookup host.docker.internal
Server:     192.168.1.1
Address:    192.168.1.1#53

** server can't find host.docker.internal: NXDOMAIN

$ docker run -it --rm --privileged --pid=host justincormack/nsenter1

/ # nslookup host.docker.internal
Server:     192.168.65.5
Address:    192.168.65.5:53

Non-authoritative answer:
Name:   host.docker.internal
Address: 192.168.65.2

Non-authoritative answer:
BenElgar commented 3 years ago

Closing this now I understand the problem better: https://github.com/deref/exo/issues/529